10 Things Scuba Divers Need To Know

10 Things Scuba Divers Need To Know

It doesn't matter whether you have done 5 dives or 500 dives, the 10 Things Scuba Divers Need To Know applies to all divers.

When underwater, there are some important rules and guidelines you should follow that keep you safe. But you are not the only thing that needs to be kept safe. We also want to teach you some stuff to ensure you protect the underwater world.

These are not conservation techniques, but just things to keep in mind to ensure you do not cause any harm while diving, so you can go back and enjoy the aquatic world for years to come, and future generations can do the same.



  1. Do Not Touch
  2. Don’t Follow Peer Pressure
  3. Improve Your Buoyancy Skills
  4. Watch Your Fins
  5. Check Your Dive Gear
  6. Always Blow Bubbles
  7. Know Your Gas
  8. Do NOT Exceed Your Limits
  9. Listen To Dive Briefings
  10. Take Only Pictures, Leave Nothing But Bubbles


1) Do Not Touch

Being underwater and surrounded by the most amazing fauna and sea life can create certain temptations. You will see the most incredible variety of colours and shapes, reefs and coral, as well as fascinating creatures, however, you should never touch anything no matter how tempting.

What some people don’t realise is that many of the things you see underwater are delicate living beings. Touching them may cause irreversible damage and even lead to them dying, such as coral for example. Another reason not to touch anything is that some of these beings are likely to react in order to protect themselves, like stinging or biting, which can cause serious injury.

Due to all this, scuba divers have a great motto which we recommend you should follow at all times: “Take nothing but pictures and leave nothing but bubbles”.

Do not touch or harass marine life while scuba diving


2) Don’t Follow Peer Pressure

Every diver within a group or buddy team should be comfortable with the proposed plan ahead of making the dive. If you have any concern or worry, or there is anything you want to discuss prior to making the dive, don’t be afraid to speak up and don’t let others tell you what is right or not. You are responsible for your own safety, and it is not worth getting hurt or worse for the sake of missing a dive. A diver needs to be happy with the plan and confident that it is well within their personal limitations and training.

This is not just the case before a dive. You should let your buddies know immediately if anything during the dive makes you uncomfortable and abort the dive if necessary. There is no shame in doing so, and no diver should ever be questioned about their reasons for aborting a dive.

Do not succumb to peer pressure to make a dive


3) Improve Your Buoyancy Skills

Buoyancy control is an essential skill you learn during your Open Water course and is something that every scuba diver should strive to perfect. Any diver should be able to ascend or descend by using breath control and maintain neutral buoyancy throughout a dive.

This is not just really important as it affects your air consumption and overall exertion levels during a dive, it also means that you are unlikely to kick or bump into anything you shouldn’t, which may cause serious harm to aquatic life.

Work on improving your buoyancy skills on every dive (even in the pool)


4) Watch Your Fins

Being in control of your fins and aware of your surroundings is also a very important skill you need to know. A diver who is not aware of where their fins are going will undoubtedly hit or break something at some point, or even kick another diver in the face. This can upset habitats, hurt aquatic life, and you could even end up kicking your buddy’s regulator out of their mouth!

If you do hit something with your fin (happens to the best of us), stop and check what you’ve hit, and position yourself to make sure you don’t do it again.

Always ensure you are considerate and aware of your surroundings as well as your own body. Also practice good buoyancy control and always keep a few metres above the bottom and away from walls and other obstacles, which reduces the risk of accidentally hitting or kicking something.

Make sure your fins do not damage any fragile marine life


5) Check Your Dive Gear

Irrespective of which brand, design or type of dive gear you choose, the purpose is the same – your gear is there to keep you safe. It is therefore essential that you look after it, keep it well maintained and service it regularly.

Looking after your gear will make it more reliable during your dives and will give you that extra peace of mind. If you’re unsure if or when any of your gear needs servicing, check the manufacturer’s guidelines or come down to the dive centre for a chat!

Check your gear before every dive and get it serviced annually


6) Always Blow Bubbles

We may have put this as number 6 on our list, but it is, of course, the most important rule of scuba diving. Never ever hold your breath!

This rule gets a lot of emphasis during your basic scuba diving training, and there’s a very good reason for it. Air compresses and expands as you change depths, due to the changes in pressure. During a dive, you will notice this the most in your BCD and drysuit (if using one), and you will have to make up for those changes by adding or letting out air. The same also happens to your lungs, so if you were to hold your breath while ascending, for example, the expanding air in your lungs could cause some serious injury.

So remember to always calmly inhale and exhale during your dive, and always blow those bubbles!

Always breath and never hold your breath, or just blow bubble rings!


7) Know Your Gas

The air in your tank is what keeps you alive underwater, so it goes without saying that you should always know how much you have left. Make a habit of checking your gauges as often as possible during a dive and communicate with your buddies when it’s time to turn the dive.

It’s equally important that you thoroughly plan your dive before making it, including turn pressures, and that you dive the plan. Your plan should be conservative and well within your limits.

As you become more experienced as a scuba diver, you will get a feel for how quickly you breathe down your air, and your air consumption may get better as you improve on skills such as buoyancy control and finning techniques. But regularly checking your gauges remains essential no matter how many dives you have or how confident you are as a diver.

Make sure you know your gas at all times by checking contents gauges or computers regularly


8) Do NOT Exceed Your Limits

Every scuba diver has limitations, whether that’s down to training, experience, skill, or what they personally feel comfortable with. Be honest with yourself, don’t disregard the risks and only make a dive that’s within all those limits. Choose dive sites that are suitable for your level of experience and other limitations, and dive with buddies that have similar limitations to your own or are happy to plan the dive based on yours.

It goes without saying that exceeding your personal limits on a dive is not just going to take the fun out of it, it will also put yours and your buddies’ safety at risk.

Know your limits on a dive, especially depth and time


9) Listen To Dive Briefings

Dive briefings are important, as they will give you essential information such as an overview/map of the dive site, a summary of the dive plan, and an idea on what you can expect in terms of diving conditions and wildlife.

Not listening to the briefing can mean that you may miss out on things the dive site has to offer, it could completely spoil your dive, or even worse, you could end up getting lost!

Listen to your briefings from the Divemaster or Skipper before each dive


10) Take Only Pictures, Leave Nothing But Bubbles!

This point is so important that we think it deserves repetition and we know that this doesn't actually make it 10 Things Scuba Divers Need to Know. But scuba divers should not touch anything underwater and don’t take anything with you that you shouldn’t. And remember the saying: take nothing but pictures, leave nothing but bubbles.

It's important to take nothing but pictures and leave nothing but bubbles


The 10 Things Scuba Divers Need to Know are not by any means the only things you need know. We are sure you can think of more. Leave your thoughts in the comments below.

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